A247948 Five-digit odd semiprimes with all digits distinct.

10237, 10239, 10249, 10265, 10279, 10297, 10327, 10345, 10347, 10349, 10367, 10379, 10389, 10397, 10423, 10435, 10473, 10483, 10489, 10493, 10495, 10497, 10523, 10537, 10543, 10547, 10573, 10579, 10583, 10587, 10623, 10637, 10643, 10645, 10649

Offset

1,1

Comments

There are exactly 4858 five-digit odd semiprimes with all digits distinct. The last few terms of the sequence are: 98501, 98503, 98517, 98521, 98531, 98537, 98567, 98603, 98607, 98617, 98635, 98647, 98653, 98657, 98671, 98701, 98723, 98741, 98743, 98751, 98765.

See the link with the b-file for all 4858 entries.

Links

K. D. Bajpai, Table of n, a(n) for n = 1..4858

Example

a(1) = 10237 = 29 * 353 is the smallest five-digit odd semiprime with all digits distinct.
a(4858) = 98765 = 5 * 19753 is the largest five-digit odd semiprime with all digits distinct.

Mathematica

c = 0; Do[If[Length[Union[IntegerDigits[n]]] == 5 && PrimeOmega[n] == 2, c++; Print[c, "  ", n]], {n, 10001, 99999, 2}]

Crossrefs

Cf. A001358, A046315, A074671, A074673, A235690, A247947.

Sequence in context: A236743 A031987 A235693 * A254563 A074671 A235157

Adjacent sequences: A247945 A247946 A247947 * A247949 A247950 A247951

Keyword

nonn,base,fini,full

Author

K. D. Bajpai, Sep 27 2014

Status

approved